Alert archive / New York / Monroe County

Weather alerts in Monroe County, New York, 2009

114 weather alerts in 2009, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Monroe County and its neighbors

Each county as a circle sized by its count in 2009. Tap one for its archive.

Alerts
114
Warnings
38
Watches
18
Advisories
39
Busiest month
August23 alerts
Busiest day
August 10, 20099 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

1 of 2 tornado warnings covering Monroe County in 2009 had a tornado report inside them; 1 of 1 tornado reports fell inside a warning, on average 9 minutes after it went out.

Monroe County, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
Tornado warnings2150%1100%9 min
Severe thunderstorm warnings221723%13100%40 min
Flash flood warnings5260%3100%40 min

Each office's whole area, 2009

WarningsWith a reportFalse alarm ratioReportsInside a warningMean lead time
NWS Buffalo, NY: tornado warnings7271%540%7 min
NWS Buffalo, NY: severe thunderstorm warnings1095748%13492%30 min
NWS Buffalo, NY: flash flood warnings291259%2789%51 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeLasted
Jan 4, 4:39 PM ESTFreezing Rain AdvisoryBUF14 hr
Jan 6, 3:53 AM ESTWinter Weather AdvisoryBUF36 hr
Jan 7, 12:10 AM ESTMesoscale DiscussionSPC4 hr
Jan 8, 3:04 PM ESTLake Effect Snow AdvisoryBUF6 hr
Jan 10, 3:45 AM ESTWinter Weather AdvisoryBUF26 hr
Jan 10, 7:58 PM ESTMesoscale DiscussionSPC4 hr
Jan 12, 3:09 PM ESTWinter Weather AdvisoryBUF31 hr
Jan 14, 3:32 PM ESTWinter Weather AdvisoryBUF15 hr
Jan 15, 4:29 AM ESTWind Chill WarningBUF11 hr
Jan 15, 3:46 PM ESTWind Chill AdvisoryBUF43 hr
Jan 15, 10:33 PM ESTLake Effect Snow AdvisoryBUF6 hr
Jan 17, 2:07 PM ESTWinter Weather AdvisoryBUF32 hr
Jan 26, 3:42 PM ESTWinter Storm WatchBUF20 hr
Jan 27, 11:48 AM ESTWinter Storm WarningBUF34 hr
Feb 4, 3:35 PM ESTLake Effect Snow AdvisoryBUF31 hr
Feb 10, 3:12 PM ESTHigh Wind WatchBUF23 hr
Feb 11, 2:34 PM ESTHigh Wind WarningBUF21 hr
Feb 12, 11:39 AM ESTWind AdvisoryBUF6 hr
Feb 12, 2:38 PM ESTRiver Flood WarningBUF40 hr
Feb 12, 2:38 PM ESTRiver Flood WarningBUF55 hr
Feb 20, 7:18 PM ESTLake Effect Snow AdvisoryBUF5 hr
Feb 22, 4:09 AM ESTLake Effect Snow AdvisoryBUF41 hr
Mar 7, 11:46 AM ESTFlood WatchBUF44 hr
Mar 7, 10:38 PM ESTAreal Flood AdvisoryBUF6 hr
Mar 7, 11:46 PM ESTAreal Flood AdvisoryBUF70 days
Mar 8, 11:16 PM EDTRiver Flood WarningBUF60 hr
Mar 8, 11:16 PM EDTRiver Flood WarningBUF60 hr
Mar 9, 10:28 PM EDTFlood WatchBUF36 hr
Mar 10, 9:36 PM EDTWind AdvisoryBUF24 hr
Apr 3, 4:29 AM EDTWind AdvisoryBUF40 hr
Apr 5, 4:52 AM EDTWinter Storm WatchBUF34 hr
Apr 6, 3:04 PM EDTWinter Weather AdvisoryBUF20 hr
Apr 25, 4:54 PM EDTMesoscale DiscussionSPC66 min
May 9, 4:07 AM EDTWind AdvisoryBUF20 hr
May 9, 12:43 PM EDTSevere Thunderstorm WatchSPC6 hr
May 10, 3:53 AM EDTFrost AdvisoryBUF28 hr
May 11, 9:50 AM EDTFrost AdvisoryBUF22 hr
May 12, 1:51 PM EDTFrost AdvisoryBUF17 hr
May 16, 12:05 PM EDTMesoscale DiscussionSPC55 min
May 17, 4:48 AM EDTFrost AdvisoryBUF27 hr
May 18, 3:04 PM EDTFrost AdvisoryBUF16 hr
May 28, 5:44 PM EDTFlash Flood WarningBUF3 hr
Jun 25, 12:14 PM EDTMesoscale DiscussionSPC61 min
Jun 25, 12:38 PM EDTSevere Thunderstorm WatchSPC7 hr
Jun 25, 6:14 PM EDTMesoscale DiscussionSPC91 min
Jun 26, 12:10 PM EDTSevere Thunderstorm WarningBUF65 min
Jun 26, 12:32 PM EDTSevere Thunderstorm WatchSPC6 hr
Jun 26, 12:41 PM EDTSevere Thunderstorm WarningBUF64 min
Jun 26, 1:09 PM EDTSevere Thunderstorm WarningBUF66 min
Jun 26, 1:32 PM EDTFlash Flood WarningBUF3 hr
Jun 26, 1:34 PM EDTSevere Thunderstorm WarningBUF56 min
Jun 26, 2:23 PM EDTSevere Thunderstorm WarningBUF67 min
Jun 30, 11:55 AM EDTAreal Flood AdvisoryBUF93 min
Jun 30, 7:23 PM EDTFlash Flood WarningBUF110 min
Jul 1, 2:54 PM EDTAreal Flood AdvisoryBUF3 hr
Jul 2, 10:05 AM EDTFlash Flood WatchBUF10 hr
Jul 11, 10:57 AM EDTSevere Thunderstorm WatchSPC7 hr
Jul 11, 12:21 PM EDTAreal Flood AdvisoryBUF2 hr
Jul 11, 7:06 PM EDTMesoscale DiscussionSPC114 min
Jul 21, 4:53 PM EDTSevere Thunderstorm WarningBUF35 min
Jul 21, 6:07 PM EDTAreal Flood AdvisoryBUF3 hr
Jul 21, 6:18 PM EDTFlash Flood WarningBUF108 min
Jul 25, 3:50 PM EDTSevere Thunderstorm WatchSPC5 hr
Jul 25, 5:03 PM EDTTornado WarningBUF42 min
Jul 25, 5:25 PM EDTSevere Thunderstorm WarningBUF65 min
Jul 25, 5:46 PM EDTTornado WarningBUF44 min
Jul 25, 6:17 PM EDTSevere Thunderstorm WarningBUF43 min
Jul 25, 6:56 PM EDTSevere Thunderstorm WarningBUF64 min
Jul 25, 7:43 PM EDTMesoscale DiscussionSPC62 min
Jul 25, 8:00 PM EDTSevere Thunderstorm WarningBUF41 min
Jul 26, 12:56 PM EDTMesoscale DiscussionSPC2 hr
Aug 4, 5:35 PM EDTSevere Thunderstorm WarningBUF55 min
Aug 4, 6:09 PM EDTMesoscale DiscussionSPC66 min
Aug 9, 11:36 AM EDTMesoscale DiscussionSPC24 min
Aug 9, 11:57 AM EDTSevere Thunderstorm WatchSPC6 hr
Aug 9, 12:51 PM EDTSevere Thunderstorm WarningBUF54 min
Aug 9, 1:35 PM EDTSevere Thunderstorm WarningBUF55 min
Aug 9, 7:11 PM EDTMesoscale DiscussionSPC2 hr
Aug 9, 8:47 PM EDTSevere Thunderstorm WatchSPC4 hr
Aug 9, 8:58 PM EDTSevere Thunderstorm WarningBUF92 min
Aug 9, 10:08 PM EDTSevere Thunderstorm WarningBUF67 min
Aug 9, 10:28 PM EDTSevere Thunderstorm WarningBUF65 min
Aug 10, 4:25 AM EDTFlash Flood WatchBUF17 hr
Aug 10, 6:02 AM EDTFlash Flood WarningBUF109 min
Aug 10, 2:26 PM EDTMesoscale DiscussionSPC2 hr
Aug 10, 3:13 PM EDTSevere Thunderstorm WatchSPC8 hr
Aug 10, 6:21 PM EDTSevere Thunderstorm WarningBUF54 min
Aug 13, 3:47 AM EDTDense Fog AdvisoryBUF5 hr
Aug 18, 2:32 PM EDTMesoscale DiscussionSPC88 min
Aug 18, 3:18 PM EDTSevere Thunderstorm WarningBUF57 min
Aug 20, 6:54 PM EDTSevere Thunderstorm WatchSPC5 hr
Aug 20, 10:04 PM EDTSevere Thunderstorm WarningBUF56 min
Aug 20, 10:40 PM EDTMesoscale DiscussionSPC95 min
Aug 22, 4:53 PM EDTSevere Thunderstorm WarningBUF33 min
Sep 23, 1:18 PM EDTMesoscale DiscussionSPC57 min
Sep 27, 3:43 PM EDTWind AdvisoryBUF30 hr
Sep 28, 10:49 AM EDTMesoscale DiscussionSPC56 min
Sep 28, 11:35 AM EDTSevere Thunderstorm WatchSPC3 hr
Sep 28, 12:10 PM EDTSevere Thunderstorm WarningBUF65 min
Sep 28, 1:08 PM EDTSevere Thunderstorm WarningBUF52 min
Sep 28, 1:45 PM EDTMesoscale DiscussionSPC90 min
Oct 6, 3:57 PM EDTWind AdvisoryBUF28 hr
Oct 11, 4:09 AM EDTFrost AdvisoryBUF29 hr
Oct 30, 3:44 PM EDTWind AdvisoryBUF26 hr
Dec 8, 4:33 AM ESTHigh Wind WatchBUF11 hr
Dec 8, 3:48 PM ESTHigh Wind WarningBUF42 hr
Dec 8, 4:05 PM ESTWinter Weather AdvisoryBUF20 hr
Dec 8, 11:32 PM ESTMesoscale DiscussionSPC6 hr
Dec 9, 3:49 PM ESTLake Effect Snow WarningBUF66 hr
Dec 9, 3:49 PM ESTLake Effect Snow AdvisoryBUF37 hr
Dec 10, 9:44 AM ESTWind AdvisoryBUF18 hr
Dec 13, 4:02 AM ESTFreezing Rain AdvisoryBUF11 hr
Dec 15, 3:49 PM ESTLake Effect Snow AdvisoryBUF34 hr
Dec 28, 5:30 AM ESTLake Effect Snow AdvisoryBUF47 hr

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force nowTornadoes on recordForecastThe radar archive20082010

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.